According to an Advertisement, a Strain of Soybeans Planted on Soil

Essay

According to an advertisement, a strain of soybeans planted on soil prepared with a specified fertilizer treatment has a mean yield of 556 bushels per acre. Twenty-five farmers who belong to a cooperative plant the soybeans in soil prepared as specified. Each uses a 40-acre plot and records the mean yield per acre. The mean and variance for the sample of 25 farms are $\bar { x } = 517 \text { and } s ^ { 2 } =$ 9580. Specify the null and alternative hypotheses used to determine if the mean yield for the soybeans is different than advertised.